What is the problem with making an entrance from the street, which in fact is. There are a lot of people in the store, you need to queue near the security cameras and self-service cash desks, the store's customers are freaking out that they can't get through. And mothers with a stroller will not go there at all .
I don't know how things are with the service, but entering the post office in the store when there is an evening influx of customers is somehow not comme il faut.